#include "reg52.h"

typedef unsigned int u16;	
typedef unsigned char u8;

sbit LED1=P2^0;	


void delay_10us(u16 ten_us)
{
	while(ten_us--);	
}


void main()
{	
	while(1)
	{
		LED1=0;	
		delay_10us(50000); 
		LED1=1;	
		delay_10us(50000); 	
	}		
}